arm: Rename pte-v6.h to pte.h

There is no need for this to be versioned after the removal of armv4/v5

Sponsored by:	Arm Ltd
Differential Revision:	https://reviews.freebsd.org/D41139

sys/arm/arm/locore-v6.S

@@ -34,7 +34,7 @@
 #include <machine/asmacros.h>
 #include <machine/armreg.h>
 #include <machine/sysreg.h>
-#include <machine/pte-v6.h>
+#include <machine/pte.h>
 
 __FBSDID("$FreeBSD$");
 

sys/arm/include/pmap_var.h

@@ -30,7 +30,7 @@
 #ifndef _MACHINE_PMAP_VAR_H_
 #define _MACHINE_PMAP_VAR_H_
 
-#include <machine/pte-v6.h>
+#include <machine/pte.h>
 
 /*
  *  Various PMAP defines, exports, and inline functions

sys/arm/mv/mv_armv7_machdep.c

@@ -62,7 +62,7 @@ __FBSDID("$FreeBSD$");
 #include <machine/machdep.h>
 #include <machine/platform.h>
 #include <machine/platformvar.h>
-#include <machine/pte-v6.h>
+#include <machine/pte.h>
 
 #include <arm/mv/mvreg.h>
 #include <arm/mv/mvvar.h>